Inside costs usually average between 1/3 the cost to one half depending on how bad the inside windows are and how easy they are to get to.

 Extra services options like Hard water treatment , tracks , Screens , Blinds, Gutters were not included and are additional.

Other reasons for cost variation may be the number of windows or panes - easy access
Height - Risk & degree of difficulty.

            For example :

Exterior screens may run $1.00 extra for each
or inside panes $1.00 to 2 dollars or inside tracks $25.00 to $40.00 depending on condition or size of home and how many.